Answer:
answer to your question is: a = 3, b = 1, c = -2
Answer:
he put 3 in the bag because 12 divided by 4 is 3 brainliest please? ^.^
Step-by-step explanation:
<u>Answer:</u>
96
<u>Step-by-step explanation:</u>
Let's assume that the marks needed in the next exam is
. Then if the average becomes 90,

Now we can simply solve for
:
⇒ 
⇒
[Multiplying both sides by 4]
⇒
[Subtracting 264 from both sides]
⇒ 
Therefore, you need to score 96 in your next exam to have an average of 90 on the four exams.